This is generally frowned upon by the NHL, which is why Scandella was fined for the hit on Monday:
Minnesota Wild defenseman Marco Scandella has been fined $2,755.38, the maximum allowable under the Collective Bargaining Agreement, for an illegal check to the head of St. Louis Blues forward T.J. Oshie during NHL Game No. 351 in St. Paul on Saturday, November 29, the National Hockey League’s Department of Player Safety announced today.
The incident occurred at 8:45 of the first period. Scandella was assessed a minor penalty for illegal check to the head.
Oshie returned to the game, which is probably the reason why Scandella wasn’t suspended here, along with him being a first-time offender.
Michael Russo writes that the fine is “half of one day’s pay” for Scandella, a.k.a. the max amount allowable under the CBA for a first-time offender.